Growth optimisation of microalga mutant at high CO2 concentration to purify undiluted anaerobic digestion effluent of swine manure

Jun Cheng, Jiao Xu, Yun Huang, Yuyou Li, Junhu Zhou, Kefa Cen

研究成果: Article査読

70 被引用数 (Scopus)

抄録

Growth rate of the microalga Chlorella PY-ZU1 mutated by nuclear irradiation was optimised for use in the purification of undiluted anaerobic digestion effluent of swine manure (UADESM) with 3745mgL-1 chemical oxygen demand (COD) and 1135mgL-1 total nitrogen content. The problem of accessible carbon in UADESM was solved by continuous introduction of 15% (v/v) CO2. Adding phosphorus to UADESM and aeration of UADESM before inoculation both markedly reduced the lag phase of microalgal growth. In addition, the biomass yield and average growth rate of Chlorella PY-ZU1 increased significantly to 4.81gL-1 and 601.2mgL-1d-1, respectively, while the removal efficiencies of total phosphorus, COD and ammonia nitrogen increased to 95%, 79% and 73%, respectively. Thus, the findings indicate that Chlorella PY-ZU1 can be used for effective purification of UADESM, while the biomass can be safely used as animal feed supplement.

本文言語English
ページ(範囲)240-246
ページ数7
ジャーナルBioresource Technology
177
DOI
出版ステータスPublished - 2015 2 1

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 環境工学
  • 再生可能エネルギー、持続可能性、環境
  • 廃棄物管理と処理

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